Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart

I have a 2016 international prostar with a cummings engine ixs. It had a front engine seal leak. I added this at my last oil change. It took about two weeks and it stopped leaking oil. Yes I was surprised because I added only one gallon, not to mention that I really didn't think it would work. My leak was so bad it was oil was blowing on my right steer brake, this has save me some time.I have 960000 miles on my engine, trying to hold out until a rebuild .

Definitely helps slow down leaks.

I have a leaking intake manifold gasket and the engine needs to be removed to replace and the car has over 200,000 miles on it. Works better that it is warmer which I believe improves the viscosity of oil but it will never stop leaking.I'll let the next person decide what to do because I upgraded to a newer year and model. And, yes, to be sure, I will express all that my older car needs when I sell. The good thing is that I have maintained well enough that it will pass inspection and that was always the case. Don't know why I am shaking this but it's my post so there we are...LOL

How I arrived at my overall rating: ***** (5 stars)Value ***** (5 stars)Purchase price: $10.99Seems like a decent price for some insurance.Quality/Durability ***** (5 stars)Duration of use: 5 yearsSeems to do what its supposed to do.Ease of Use/Assembly/Install: ***** (5 stars)The bottle makes pouring it without a mess and no need for a funnel.Usefulness/Appearance/Fun Factor: ***** (5 stars)I have started using this for all older engines (>10 years or >100,000miles). I've always had older cars, and for most, at some point there will be small oil leaks around the oil pan or filter housing or head gasket. I started using this with one of my older cars at about 110,000miles and it's now at about 135,000miles and is oil free.Have not noticed any diff in mileage. Maybe engine is a little bit quieter? Not sure, but it's not louder.Will continue to use!

This product has been negatively reviewed far too many times, and I felt compelled to write a review on it. I have used this product on 3 cars with oil leaks, and my family has used it on their cars as well. My family has had great success with minor oil leaks, and 2 of my 3 cars I have used this on resulted in their oil leaks ceasing completely. My other car turned out to be a decent sized crack in my oil pan gasket, which explains why throwing some Stop Leak at it didn't solve my issue. This product helps greatly to repair old, hardened seals, but it doesn't falsely advertise to bring about miraculous results in moderate to major issues. My point is, this product works extremely well for it's intended purposes, and I feel that all of the negative reviews should be taken with an grain of salt. It would be spectacular to hear, from the negative reviewers, what sort of issues ended up being diagnosed in the cars this product didn't help. I'm by no means trying to put down the negative reviewers, but it does get a bit frustrating reading reviews on Amazon like "Put it in my car, didn't work, still leaking, crap product" or "I contracted a flesh-eating bacteria, and this 'highly rated' Neosporin didn't work. Don't waste your time. 1 star. Booooooo!!!!" Lucas Stop Leak is a great product for it's intended purposes, has been used and trusted by amateur and professional mechanics for years, and fully deserves a solid 5 stars.

I am astounded by this oil additive! I've never been one to use oil or antifreeze additives in the past, however I heard a mechanic talking about this product and I figured what the heck. I have a 2002 GMC Yukon with the typical rear main leak, and I mean LEAK! The engine would leave puddles wherever I went and I would often need to add 1/2 a quart every other week or so. I was quoted approximately $2200.00 to repair the rear main, which is nearly what the vehicle is worth so that was out of the question. So I gave this a try and I am shocked! I have only driven approx 200 miles (I do not drive much and all my driving is in town) so far and I keep checking the oil...and each time I check the stick reads full! I would have needed to add at least 1/2 quart by now! I just cannot say enough about this product and I will certainly recommend Lucas oil stop leak to anyone. I have also noticed my engine sounds better and it doesn't seem to be burning oil anymore as well! The spots under the vehicle have shrunk to just a few drips so I will continue to use with each oil change. Saved me $2200 for sure and my engine has 182,000 miles on it. Kudos to Lucas Oil!!

I have used a couple Lucas products in the past that have been almost miracles. Transmission Fix and Power Steering Stop Leak saved me thousands of dollars in repairs. This didn't live up to their other products, but the issue is probably my 190K engine and not the product.

Good stuff